package com.example.demo.anno;

import com.example.demo.validation.StateValidation;

import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;

@Documented//元注解
@Constraint(
        validatedBy = {
                StateValidation.class//提供校验规则的类
        }
)
@Target({ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface State {
    //提供校验失败后的信息
    String message() default "state参数的值只能是已发布或者草稿";

    //指定分组
    Class<?>[] groups() default {};

    //负载，获取到state注解的其它信息
    Class<? extends Payload>[] payload() default {};
}
